[blktrace.git] / btt / iostat.c

/*
 * blktrace output analysis: generate a timeline & gather statistics
 *
 * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include <stdio.h>
#include <unistd.h>
#include "globals.h"

#define INC_STAT(dip, fld) 						\
	do { 								\
		(dip)->stats. fld ++;					\
		(dip)->all_stats. fld ++;				\
	} while (0)

#define DEC_STAT(dip, fld) 						\
	do { 								\
		(dip)->stats. fld --;					\
		(dip)->all_stats. fld --;				\
	} while (0)

#define ADD_STAT(dip, fld, val) 					\
	 do { 								\
		 __u64 __v = (val);					\
		(dip)->stats. fld += __v;				\
		(dip)->all_stats. fld += __v;				\
	} while (0)

#define SUB_STAT(dip, fld, val) 					\
	 do { 								\
		 __u64 __v = (val);					\
		(dip)->stats. fld -= __v;				\
		(dip)->all_stats. fld -= __v;				\
	} while (0)

__u64 last_start, iostat_last_stamp;
__u64 iostat_interval = 1;
char *iostat_name = NULL;
FILE *iostat_ofp = NULL;

void dump_hdr(void)
{
	fprintf(iostat_ofp, "Device:       rrqm/s   wrqm/s     r/s     w/s    "
			    "rsec/s    wsec/s     rkB/s     wkB/s "
			    "avgrq-sz avgqu-sz   await   svctm  %%util   Stamp\n");
}

void iostat_init(void)
{
	last_start = (__u64)-1;
	if (iostat_ofp)
		dump_hdr();
}

void update_tot_qusz(struct d_info *dip, double now)
{
	dip->stats.tot_qusz += ((now - dip->stats.last_qu_change) *
						dip->stats.cur_qusz);
	dip->all_stats.tot_qusz += ((now - dip->all_stats.last_qu_change) *
						dip->all_stats.cur_qusz);

	dip->stats.last_qu_change = dip->all_stats.last_qu_change = now;
}

void update_idle_time(struct d_info *dip, double now, int force)
{
	if (dip->stats.cur_dev == 0 || force) {
		dip->stats.idle_time += (now - dip->stats.last_dev_change);
		dip->all_stats.idle_time += 
				       (now - dip->all_stats.last_dev_change);
	}
	dip->stats.last_dev_change = dip->all_stats.last_dev_change = now;
}

void __dump_stats(__u64 stamp, int all, struct d_info *dip, struct stats_t *asp)
{
	char hdr[16];
	struct stats *sp;
	double dt, nios, avgrq_sz, p_util, nrqm, await, svctm;
	double now = TO_SEC(stamp);

	if (all) {
		dt = (double)stamp / 1.0e9;
		sp = &dip->all_stats;
	}
	else {
		dt = (double)(stamp-last_start) / 1.0e9;
		sp = &dip->stats;
	}

	nios = (double)(sp->ios[0] + sp->ios[1]);
	nrqm = (double)(sp->rqm[0] + sp->rqm[1]);
	update_idle_time(dip, now, 1);
	update_tot_qusz(dip, now);

	if (nios > 0.0) {
		avgrq_sz = (double)(sp->sec[0] + sp->sec[1]) / nios;
		svctm = TO_MSEC(sp->svctm) / nios;
	}
	else
		avgrq_sz = svctm = 0.0;

	await = ((nios + nrqm) > 0.0) ? TO_MSEC(sp->wait) / (nios+nrqm) : 0.0;
	p_util = (sp->idle_time <= dt) ? 100.0 * (1.0 - (sp->idle_time / dt)) :
	                                 0.0;

	/*
	 * For AWAIT: nios should be the same as number of inserts
	 * and we add in nrqm (number of merges), which should give
	 * us the total number of IOs sent to the block IO layer.
	 */
	fprintf(iostat_ofp, "%-11s ", make_dev_hdr(hdr, 11, dip));
	fprintf(iostat_ofp, "%8.2lf ", (double)sp->rqm[1] / dt);
	fprintf(iostat_ofp, "%8.2lf ", (double)sp->rqm[0] / dt);
	fprintf(iostat_ofp, "%7.2lf ", (double)sp->ios[1] / dt);
	fprintf(iostat_ofp, "%7.2lf ", (double)sp->ios[0] / dt);
	fprintf(iostat_ofp, "%9.2lf ", (double)sp->sec[1] / dt);
	fprintf(iostat_ofp, "%9.2lf ", (double)sp->sec[0] / dt);
	fprintf(iostat_ofp, "%9.2lf ", (double)(sp->sec[1] / 2) / dt);
	fprintf(iostat_ofp, "%9.2lf ", (double)(sp->sec[0] / 2) / dt);
	fprintf(iostat_ofp, "%8.2lf ", avgrq_sz);
	fprintf(iostat_ofp, "%8.2lf ", (double)sp->tot_qusz / dt);
	fprintf(iostat_ofp, "%7.2lf ", await);
	fprintf(iostat_ofp, "%7.2lf ", svctm);
	fprintf(iostat_ofp, "%6.2lf", p_util);
	if (all)
		fprintf(iostat_ofp, "%8s\n", "TOTAL");
	else {
		fprintf(iostat_ofp, "%8.2lf\n", TO_SEC(stamp));
		sp->rqm[0] = sp->rqm[1] = 0;
		sp->ios[0] = sp->ios[1] = 0;
		sp->sec[0] = sp->sec[1] = 0;
		sp->wait = sp->svctm = 0;

		sp->tot_qusz = sp->idle_time = 0.0;
	}

	if (asp) {
		int i;

		asp->n += 1.0;
		for (i = 0; i < 2; i++) {
			asp->rqm_s[i] += ((double)sp->rqm[i] / dt);
			asp->ios_s[i] += ((double)sp->ios[i] / dt);
			asp->sec_s[i] += ((double)sp->sec[i] / dt);
		}
		asp->avgrq_sz += avgrq_sz;
		asp->avgqu_sz += (double)sp->tot_qusz / dt;
		asp->await += await;
		asp->svctm += svctm;
		asp->p_util += p_util;
	}
}

void __dump_stats_t(__u64 stamp, struct stats_t *asp, int all)
{
	if (asp->n < 2.0) return;	// What's the point?

	fprintf(iostat_ofp, "%-11s ", "TOTAL");
	fprintf(iostat_ofp, "%8.2lf ", asp->rqm_s[0]);
	fprintf(iostat_ofp, "%8.2lf ", asp->rqm_s[1]);
	fprintf(iostat_ofp, "%7.2lf ", asp->ios_s[0]);
	fprintf(iostat_ofp, "%7.2lf ", asp->ios_s[1]);
	fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[0]);
	fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[1]);
	fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[0] / 2.0);
	fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[1] / 2.0);
	fprintf(iostat_ofp, "%8.2lf ", asp->avgrq_sz / asp->n);
	fprintf(iostat_ofp, "%8.2lf ", asp->avgqu_sz / asp->n);
	fprintf(iostat_ofp, "%7.2lf ", asp->await / asp->n);
	fprintf(iostat_ofp, "%7.2lf ", asp->svctm / asp->n);
	fprintf(iostat_ofp, "%6.2lf", asp->p_util / asp->n);
	if (all)
		fprintf(iostat_ofp, "%8s\n", "TOTAL");
	else 
		fprintf(iostat_ofp, "%8.2lf\n", TO_SEC(stamp));
}

void iostat_dump_stats(__u64 stamp, int all)
{
	struct d_info *dip;
	struct stats_t as;

	memset(&as, 0, sizeof(struct stats_t));
	if (all)
		dump_hdr();

	if (devices == NULL) {
		struct list_head *p;

		__list_for_each(p, &all_devs) {
			dip = list_entry(p, struct d_info, all_head);
			__dump_stats(stamp, all, dip, &as);
		}
	}
	else {
		int i;
		unsigned int mjr, mnr;
		char *p = devices;

		while (p && ((i = sscanf(p, "%u,%u", &mjr, &mnr)) == 2)) {
			dip = __dip_find((__u32)((mjr << MINORBITS) | mnr));
			__dump_stats(stamp, all, dip, &as);

			p = strchr(p, ';');
			if (p) p++;
		}
	}

	__dump_stats_t(stamp, &as, all);

	if (!all && iostat_ofp)
		fprintf(iostat_ofp, "\n");
}

void iostat_check_time(__u64 stamp)
{
	if (iostat_ofp) {
		if (last_start == (__u64)-1)
			last_start = stamp;
		else if ((stamp - last_start) >= iostat_interval) {
			iostat_dump_stats(stamp, 0);
			last_start = stamp;
		}

		iostat_last_stamp = stamp;
	}
}

void iostat_getrq(struct io *iop)
{
	update_tot_qusz(iop->dip, TO_SEC(iop->t.time));
	INC_STAT(iop->dip, cur_qusz);
}

void iostat_merge(struct io *iop)
{
	INC_STAT(iop->dip, rqm[IOP_RW(iop)]);
}

void iostat_issue(struct io *iop)
{
	int rw = IOP_RW(iop);
	struct d_info *dip = iop->dip;
	double now = TO_SEC(iop->t.time);

	INC_STAT(dip, ios[rw]);
	ADD_STAT(dip, sec[rw], iop->t.bytes >> 9);

	update_idle_time(dip, now, 0);
	INC_STAT(dip, cur_dev);
}

void iostat_unissue(struct io *iop)
{
	int rw = IOP_RW(iop);
	struct d_info *dip = iop->dip;

	DEC_STAT(dip, ios[rw]);
	SUB_STAT(dip, sec[rw], iop->t.bytes >> 9);
	DEC_STAT(dip, cur_dev);
}

void iostat_complete(struct io *q_iop, struct io *c_iop)
{
	double now = TO_SEC(c_iop->t.time);
	struct d_info *dip = q_iop->dip;

	if (q_iop->i_time != (__u64)-1)
		ADD_STAT(c_iop->dip, wait, tdelta(q_iop->i_time,c_iop->t.time));
	else if (q_iop->m_time != (__u64)-1)
		ADD_STAT(c_iop->dip, wait, tdelta(q_iop->m_time,c_iop->t.time));

	update_tot_qusz(dip, now);
	DEC_STAT(dip, cur_qusz);

	update_idle_time(dip, now, 0);
	DEC_STAT(dip, cur_dev);

	ADD_STAT(dip, svctm, tdelta(q_iop->t.time, c_iop->t.time));
}
Commit	Line	Data
21e47d90 ADB	1	/*
	2	* blktrace output analysis: generate a timeline & gather statistics
	3	*
	4	* Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
	21	#include <stdio.h>
	22	#include <unistd.h>
	23	#include "globals.h"
	24
21e47d90 ADB	25	#define INC_STAT(dip, fld) \
	26	do { \
	27	(dip)->stats. fld ++; \
	28	(dip)->all_stats. fld ++; \
	29	} while (0)
	30
	31	#define DEC_STAT(dip, fld) \
	32	do { \
	33	(dip)->stats. fld --; \
	34	(dip)->all_stats. fld --; \
	35	} while (0)
	36
	37	#define ADD_STAT(dip, fld, val) \
	38	do { \
	39	__u64 __v = (val); \
	40	(dip)->stats. fld += __v; \
	41	(dip)->all_stats. fld += __v; \
	42	} while (0)
	43
	44	#define SUB_STAT(dip, fld, val) \
	45	do { \
	46	__u64 __v = (val); \
	47	(dip)->stats. fld -= __v; \
	48	(dip)->all_stats. fld -= __v; \
	49	} while (0)
	50
	51	__u64 last_start, iostat_last_stamp;
	52	__u64 iostat_interval = 1;
	53	char *iostat_name = NULL;
	54	FILE *iostat_ofp = NULL;
	55
21e47d90 ADB	56	void dump_hdr(void)
	57	{
	58	fprintf(iostat_ofp, "Device: rrqm/s wrqm/s r/s w/s "
	59	"rsec/s wsec/s rkB/s wkB/s "
	60	"avgrq-sz avgqu-sz await svctm %%util Stamp\n");
	61	}
	62
	63	void iostat_init(void)
	64	{
	65	last_start = (__u64)-1;
	66	if (iostat_ofp)
	67	dump_hdr();
	68	}
	69
	70	void update_tot_qusz(struct d_info *dip, double now)
	71	{
	72	dip->stats.tot_qusz += ((now - dip->stats.last_qu_change) *
	73	dip->stats.cur_qusz);
	74	dip->all_stats.tot_qusz += ((now - dip->all_stats.last_qu_change) *
	75	dip->all_stats.cur_qusz);
	76
	77	dip->stats.last_qu_change = dip->all_stats.last_qu_change = now;
	78	}
	79
d216e9ce	80	void update_idle_time(struct d_info *dip, double now, int force)
21e47d90	81	{
d216e9ce	82	if (dip->stats.cur_dev == 0 \|\| force) {
21e47d90 ADB	83	dip->stats.idle_time += (now - dip->stats.last_dev_change);
	84	dip->all_stats.idle_time +=
	85	(now - dip->all_stats.last_dev_change);
	86	}
	87	dip->stats.last_dev_change = dip->all_stats.last_dev_change = now;
	88	}
	89
4a5cddba	90	void __dump_stats(__u64 stamp, int all, struct d_info dip, struct stats_t asp)
21e47d90 ADB	91	{
	92	char hdr[16];
	93	struct stats *sp;
d216e9ce	94	double dt, nios, avgrq_sz, p_util, nrqm, await, svctm;
21e47d90 ADB	95	double now = TO_SEC(stamp);
	96
	97	if (all) {
	98	dt = (double)stamp / 1.0e9;
	99	sp = &dip->all_stats;
	100	}
	101	else {
	102	dt = (double)(stamp-last_start) / 1.0e9;
	103	sp = &dip->stats;
	104	}
	105
	106	nios = (double)(sp->ios[0] + sp->ios[1]);
	107	nrqm = (double)(sp->rqm[0] + sp->rqm[1]);
d216e9ce ADB	108	update_idle_time(dip, now, 1);
	109	update_tot_qusz(dip, now);
	110
21e47d90	111	if (nios > 0.0) {
21e47d90	112	avgrq_sz = (double)(sp->sec[0] + sp->sec[1]) / nios;
d216e9ce ADB	113	svctm = TO_MSEC(sp->svctm) / nios;
	114	}
	115	else
	116	avgrq_sz = svctm = 0.0;
	117
	118	await = ((nios + nrqm) > 0.0) ? TO_MSEC(sp->wait) / (nios+nrqm) : 0.0;
	119	p_util = (sp->idle_time <= dt) ? 100.0 * (1.0 - (sp->idle_time / dt)) :
	120	0.0;
	121
	122	/*
	123	* For AWAIT: nios should be the same as number of inserts
	124	* and we add in nrqm (number of merges), which should give
	125	* us the total number of IOs sent to the block IO layer.
	126	*/
	127	fprintf(iostat_ofp, "%-11s ", make_dev_hdr(hdr, 11, dip));
	128	fprintf(iostat_ofp, "%8.2lf ", (double)sp->rqm[1] / dt);
	129	fprintf(iostat_ofp, "%8.2lf ", (double)sp->rqm[0] / dt);
	130	fprintf(iostat_ofp, "%7.2lf ", (double)sp->ios[1] / dt);
	131	fprintf(iostat_ofp, "%7.2lf ", (double)sp->ios[0] / dt);
	132	fprintf(iostat_ofp, "%9.2lf ", (double)sp->sec[1] / dt);
	133	fprintf(iostat_ofp, "%9.2lf ", (double)sp->sec[0] / dt);
	134	fprintf(iostat_ofp, "%9.2lf ", (double)(sp->sec[1] / 2) / dt);
	135	fprintf(iostat_ofp, "%9.2lf ", (double)(sp->sec[0] / 2) / dt);
	136	fprintf(iostat_ofp, "%8.2lf ", avgrq_sz);
	137	fprintf(iostat_ofp, "%8.2lf ", (double)sp->tot_qusz / dt);
	138	fprintf(iostat_ofp, "%7.2lf ", await);
	139	fprintf(iostat_ofp, "%7.2lf ", svctm);
	140	fprintf(iostat_ofp, "%6.2lf", p_util);
	141	if (all)
	142	fprintf(iostat_ofp, "%8s\n", "TOTAL");
	143	else {
	144	fprintf(iostat_ofp, "%8.2lf\n", TO_SEC(stamp));
	145	sp->rqm[0] = sp->rqm[1] = 0;
	146	sp->ios[0] = sp->ios[1] = 0;
	147	sp->sec[0] = sp->sec[1] = 0;
	148	sp->wait = sp->svctm = 0;
	149
	150	sp->tot_qusz = sp->idle_time = 0.0;
21e47d90	151	}
4a5cddba JA	152
	153	if (asp) {
	154	int i;
	155
	156	asp->n += 1.0;
	157	for (i = 0; i < 2; i++) {
	158	asp->rqm_s[i] += ((double)sp->rqm[i] / dt);
	159	asp->ios_s[i] += ((double)sp->ios[i] / dt);
	160	asp->sec_s[i] += ((double)sp->sec[i] / dt);
	161	}
	162	asp->avgrq_sz += avgrq_sz;
	163	asp->avgqu_sz += (double)sp->tot_qusz / dt;
	164	asp->await += await;
	165	asp->svctm += svctm;
	166	asp->p_util += p_util;
	167	}
	168	}
	169
	170	void __dump_stats_t(__u64 stamp, struct stats_t *asp, int all)
	171	{
	172	if (asp->n < 2.0) return; // What's the point?
	173
	174	fprintf(iostat_ofp, "%-11s ", "TOTAL");
	175	fprintf(iostat_ofp, "%8.2lf ", asp->rqm_s[0]);
	176	fprintf(iostat_ofp, "%8.2lf ", asp->rqm_s[1]);
	177	fprintf(iostat_ofp, "%7.2lf ", asp->ios_s[0]);
	178	fprintf(iostat_ofp, "%7.2lf ", asp->ios_s[1]);
	179	fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[0]);
	180	fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[1]);
	181	fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[0] / 2.0);
	182	fprintf(iostat_ofp, "%9.2lf ", asp->sec_s[1] / 2.0);
	183	fprintf(iostat_ofp, "%8.2lf ", asp->avgrq_sz / asp->n);
	184	fprintf(iostat_ofp, "%8.2lf ", asp->avgqu_sz / asp->n);
	185	fprintf(iostat_ofp, "%7.2lf ", asp->await / asp->n);
	186	fprintf(iostat_ofp, "%7.2lf ", asp->svctm / asp->n);
	187	fprintf(iostat_ofp, "%6.2lf", asp->p_util / asp->n);
	188	if (all)
	189	fprintf(iostat_ofp, "%8s\n", "TOTAL");
	190	else
	191	fprintf(iostat_ofp, "%8.2lf\n", TO_SEC(stamp));
21e47d90 ADB	192	}
	193
	194	void iostat_dump_stats(__u64 stamp, int all)
	195	{
	196	struct d_info *dip;
4a5cddba	197	struct stats_t as;
21e47d90	198
4a5cddba	199	memset(&as, 0, sizeof(struct stats_t));
21e47d90 ADB	200	if (all)
21e47d90 ADB	201	dump_hdr();
4a5cddba	202
21e47d90 ADB	203	if (devices == NULL) {
	204	struct list_head *p;
	205
	206	__list_for_each(p, &all_devs) {
6eb42155	207	dip = list_entry(p, struct d_info, all_head);
4a5cddba	208	__dump_stats(stamp, all, dip, &as);
21e47d90 ADB	209	}
	210	}
	211	else {
	212	int i;
	213	unsigned int mjr, mnr;
	214	char *p = devices;
	215
	216	while (p && ((i = sscanf(p, "%u,%u", &mjr, &mnr)) == 2)) {
	217	dip = __dip_find((__u32)((mjr << MINORBITS) \| mnr));
4a5cddba	218	__dump_stats(stamp, all, dip, &as);
21e47d90 ADB	219
	220	p = strchr(p, ';');
	221	if (p) p++;
	222	}
	223	}
4a5cddba JA	224
	225	__dump_stats_t(stamp, &as, all);
	226
d216e9ce ADB	227	if (!all && iostat_ofp)
d216e9ce ADB	228	fprintf(iostat_ofp, "\n");
21e47d90 ADB	229	}
	230
	231	void iostat_check_time(__u64 stamp)
	232	{
	233	if (iostat_ofp) {
	234	if (last_start == (__u64)-1)
	235	last_start = stamp;
	236	else if ((stamp - last_start) >= iostat_interval) {
	237	iostat_dump_stats(stamp, 0);
	238	last_start = stamp;
	239	}
	240
	241	iostat_last_stamp = stamp;
	242	}
	243	}
	244
4c48f14e	245	void iostat_getrq(struct io *iop)
21e47d90 ADB	246	{
	247	update_tot_qusz(iop->dip, TO_SEC(iop->t.time));
	248	INC_STAT(iop->dip, cur_qusz);
	249	}
	250
	251	void iostat_merge(struct io *iop)
	252	{
	253	INC_STAT(iop->dip, rqm[IOP_RW(iop)]);
	254	}
	255
	256	void iostat_issue(struct io *iop)
	257	{
	258	int rw = IOP_RW(iop);
	259	struct d_info *dip = iop->dip;
	260	double now = TO_SEC(iop->t.time);
	261
	262	INC_STAT(dip, ios[rw]);
	263	ADD_STAT(dip, sec[rw], iop->t.bytes >> 9);
	264
d216e9ce	265	update_idle_time(dip, now, 0);
21e47d90 ADB	266	INC_STAT(dip, cur_dev);
	267	}
	268
6eb42155	269	void iostat_unissue(struct io *iop)
21e47d90	270	{
6eb42155	271	int rw = IOP_RW(iop);
21e47d90 ADB	272	struct d_info *dip = iop->dip;
21e47d90 ADB	273
6eb42155 ADB	274	DEC_STAT(dip, ios[rw]);
	275	SUB_STAT(dip, sec[rw], iop->t.bytes >> 9);
	276	DEC_STAT(dip, cur_dev);
	277	}
21e47d90	278
ae6d30f4	279	void iostat_complete(struct io q_iop, struct io c_iop)
6eb42155 ADB	280	{
6eb42155 ADB	281	double now = TO_SEC(c_iop->t.time);
ae6d30f4	282	struct d_info *dip = q_iop->dip;
21e47d90	283
ae6d30f4 AB	284	if (q_iop->i_time != (__u64)-1)
	285	ADD_STAT(c_iop->dip, wait, tdelta(q_iop->i_time,c_iop->t.time));
	286	else if (q_iop->m_time != (__u64)-1)
	287	ADD_STAT(c_iop->dip, wait, tdelta(q_iop->m_time,c_iop->t.time));
21e47d90	288
6eb42155 ADB	289	update_tot_qusz(dip, now);
	290	DEC_STAT(dip, cur_qusz);
	291
	292	update_idle_time(dip, now, 0);
	293	DEC_STAT(dip, cur_dev);
	294
ae6d30f4	295	ADD_STAT(dip, svctm, tdelta(q_iop->t.time, c_iop->t.time));
21e47d90	296	}